president obama welcomes mexico's president elect to the house today. the leaders will discuss a secure 21st century border and ways to strengthen both country's economies. >>> after black friday, small business saturday and cyber monday, organizers are hoping the first annual giving tuesday will become a new holiday tradition. the campaign encourages folks to donate time and/or money and then share the good deed on social media. >>> and veteran nbc newsman tom brokaw will be honored with the annual ken burns lifetime achievement award for his contribution to the arts through history related projects. >>> all day long you can stay on top of the very latest developments in those stories and others as they break on msnbc. and tonight be sure to watch "nbc nightly news" with brian williams. >>> and, finally, here's a look at what's coming up later this morning on the "today" show. in a "today" exclusive business tycoon warren buffett is live with his take on the state of the economy, the fiscal cliff, and taxing the rich. >>> and actress scarlett johansson